arm64: dts: qcom: Introduce the SC8180x platform

Introduce a base dtsi for the Qualcomm SC8180x platform, with CPUs,
global clock controller, SMMU, rpmh clocks, rpmh power-domains,
CPUfreq etc

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230530162454.51708-7-vkoul@kernel.org